Hello everyone, To understand what is the clipping coordinates, I tested some points using the following code:
osg::Matrixd modelviewMat= viewer->getCamera()->getViewMatrix(); osg::Matrixd projectionMat= viewer->getCamera()->getProjectionMatrix(); osg::Vec4 pos1 = projectionMat * modelviewMat * P1; According to the documents I found, the clipped coordinates (pos1.xyz()/pos1.w()) should be in the range of (-1,1). But some of the coordinates that I calculated is out the this range. For example, I got: pos1=[4.3364410, -0.95071518, -32.184357, 2.3291125], so pos.x/pos.w and pos.z/pos.w are out of the range. Also, I don't understand what is the z coordinate means in the clip coordinates. How could I get the window coordinates from the clip coordinates? Are the window coordinates equal to: [(pos.x/pos.w+1)/2*window_width,(pos.y/pos.w+1)/2*window_height] ? Thank you! Cheers, ying ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=60438#60438 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
